My last work placement was not unionized. I think this was a a large disadvantage on behalf of the employees. There was a high turnover rate, and most employees were unaware of their rights and responsibilities.
Language and attitude in the kitchen was almost always vulgar, even though I appreciated the humor from my friends in the kitchen it was upsetting to be treated the same way but people in the kitchen who were not my friends. I think if my placement was unionized i would feel a bit more respected in my work placement.